From 771b18ae9c3aa70f4a2497b59700e06819a6ae30 Mon Sep 17 00:00:00 2001
From: Zhang Xianyi <traits.zhang@gmail.com>
Date: Sun, 8 Feb 2015 01:42:48 -0600
Subject: [PATCH] Detect the wrong combined flags of USE_OPENMP=1 and
 USE_THREAD=0.

---
 Makefile.system | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Makefile.system b/Makefile.system
index 1d1d48c75..525daa41b 100644
--- a/Makefile.system
+++ b/Makefile.system
@@ -364,6 +364,12 @@ endif
 
 
 ifeq ($(USE_OPENMP), 1)
+
+#check 
+ifeq ($(USE_THREAD), 0)
+$(error OpenBLAS: Cannot set both USE_OPENMP=1 and USE_THREAD=0. The USE_THREAD=0 is only for building single thread version.)
+endif
+
 # ifeq logical or. GCC or LSB
 ifeq ($(C_COMPILER), $(filter $(C_COMPILER),GCC LSB))
 CCOMMON_OPT    += -fopenmp